
Coding Field
Selection or range
Factory setting (bold)
Display Info
R226
Enter alarm
threshold
(as an absolute
value)
150.0 °C
–50.0 ... 150.0 °C
When the alarm threshold is
violated, the measuring
transmitter issues an alarm with
an error message and error
current (note alarm delay in
field F3).
When defining the min contact,
the alarm threshold must be set
to a lower value than the
switch-off point.
R227
Show status for
limit contact
MAX
MIN
Only display.
R2 (3)
Configure
P(ID) controller
LC PV = limit
contactor pH/redox (1)
LC °C = limit
contactor T (2)
PID controller (3)
Timer (4)
Clean = ChemoClean (5)
Neutr =
Neutra controller (6)
Confirmation with ENTER
switches off a different, already
switched-on function and its
settings are reset to the default.
R231
Switch function
R2 (3) off or on
Off
On
Basic
PID+B
On = PID control
Basic = only basic load dosage
PID+B = PID control with basic
load dosage
R232 Enter set point
pH 16.00
pH –2.00 ... 16.00
1500 mV
–1500 ... 1500 mV
0.0 %
0.0 ... 100.0 %
The set point is the value to be
maintained by the control. This
value is to be re-established by
the control in the event of any
deviation (up or down).
R233
Enter control gain
K
p
1.00
0.01 ... 20.00
See chapt. 5.5.2
R234
Enter integral
action time T
n
(0.0 = no I
component)
0.0 min
0.0 ... 999.9 min
See chap. 5.5.2
At every hold the I component is
set to zero.
Hold can be deactivated in S2,
but not for ChemoClean and
timer!
R235
Enter derivative
action time T
v
(0.0=noD
component)
0.0 min
0.0 ... 999.9 min
See chap. 5.5.2
Factory settings are printed in bold face;
base version does not include functions in
italic
.
150.0R226
°C
A.Thresh
R227
LC State
MAX
PID R2
Sel.Type
off R231
Function
16.00
pH
R232
Setpoint
1.00
R233
Kp
0.0 R234
Time Tn
min
0.0 R235
Time TV
min
PM253E5B.CHP
Liquisys M CPM 223 / 253 Instrument configuration
Endress+Hauser 45
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